Using websockets with the NGINX Kubernetes ingress controller

1apiVersion: apps/v1
2kind: Deployment
3metadata:
4  name: tornado-socket
5  labels:
6    app: tornado-socket
7    group: testing
8spec:
9  replicas: 1
10  selector:
11    matchLabels:
12      app: tornado-socket
13  template:
14    metadata:
15      labels:
16        app: tornado-socket
17        group: testing
18    spec:
19      containers:
20        - name: tornado-socket
21          image: ajayinnvonix/tornado-demo
22          ports:
23            - name: websocket
24              containerPort: 8000

1apiVersion: v1
2kind: Service
3metadata:
4  name: tornado-socket
5  labels:
6    app: tornado-socket
7    group: testing
8spec:
9  type: ClusterIP
10  selector:
11    app: tornado-socket
12  ports:
13    - name: websocket
14      protocol: TCP
15      port: 8000
16      targetPort: 8000

1apiVersion: networking.k8s.io/v1
2kind: Ingress
3metadata:
4  name: tornado-socket
5  annotations:
6    nginx.ingress.kubernetes.io/proxy-read-timeout: "3600"
7    nginx.ingress.kubernetes.io/proxy-send-timeout: "3600"
8    nginx.ingress.kubernetes.io/server-snippets: |
9      location / {
10        proxy_set_header Upgrade $http_upgrade;
11        proxy_http_version 1.1;
12        proxy_set_header X-Forwarded-Host $http_host;
13        proxy_set_header X-Forwarded-Proto $scheme;
14        proxy_set_header X-Forwarded-For $remote_addr;
15        proxy_set_header Host $host;
16        proxy_set_header Connection "upgrade";
17        proxy_cache_bypass $http_upgrade;
18      }
19spec:
20  ingressClassName: nginx
21  rules:
22  - host: tornado-ws.example.com
23    http:
24      paths:
25      - path: /
26        pathType: Prefix
27        backend:
28          service:
29            name: tornado-socket
30            port:
31              number: 8000